A giant star with radius 200 times larger than our sun, exploded into a supernova, 30 million years ago. Although it was one of the closest to Earth explosions in recent years, its distance was large enough that the light from the explosion took 30 million years to arrive to us. The massive explosion was visible from the Earth as a point like in the night sky, starting July 24th, 2013.

Hitomi, the most sensitive X-ray satellite, lost communication with Earth on 26th of March, only about a month after its launch. Now scientists believe that a basic engineering error might be the cause of the failure

Astronomers detected a group of supermassive black holes that are aligned, i.e. their axe of rotation points in the same direction. Since huge distances separate the aligned black holes, there is no way of exchanging information or influencing each other directly.

There are galaxies that contain not only one, but two supermassive black holes! The two black holes are usually 3,000 light years apart from each other, a distance that roughly corresponds to the 1/8 of distance from our solar system to the center of our galaxy.